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Add (guix graph).

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* guix/scripts/graph.scm (<node-type>, <graph-backend>, emit-prologue)
(emit-epilogue, emit-node, emit-edge, %graphviz-backend, export-graph):
Move to...
* guix/graph.scm: ... here.  New file.
* guix/scripts/system.scm, tests/graph.scm: Use it.
* Makefile.am (MODULES): Add it.
This commit is contained in:
Ludovic Courtès 2015-11-21 13:12:02 +01:00
parent 1b933e62dc
commit 8fb583714f
5 changed files with 136 additions and 99 deletions
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1
Makefile.am
View file

@ -50,6 +50,7 @@ MODULES = \
guix/gnu-maintenance.scm \
guix/upstream.scm \
guix/licenses.scm \
guix/graph.scm \
guix/build-system.scm \
guix/build-system/cmake.scm \
guix/build-system/emacs.scm \

132
guix/graph.scm Normal file
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@ -0,0 +1,132 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix graph)
#:use-module (guix store)
#:use-module (guix monads)
#:use-module (guix records)
#:use-module (guix sets)
#:use-module (srfi srfi-9)
#:use-module (ice-9 match)
#:export (node-type
node-type?
node-type-identifier
node-type-label
node-type-edges
node-type-convert
node-type-name
node-type-description
%graphviz-backend
graph-backend?
graph-backend
export-graph))
;;; Commentary:
;;;
;;; This module provides an abstract way to represent graphs and to manipulate
;;; them. It comes with several such representations for packages,
;;; derivations, and store items. It also provides a generic interface for
;;; exporting graphs in an external format, including a Graphviz
;;; implementation thereof.
;;;
;;; Code:
;;;
;;; Node types.
;;;
(define-record-type* <node-type> node-type make-node-type
node-type?
(identifier node-type-identifier) ;node -> M identifier
(label node-type-label) ;node -> string
(edges node-type-edges) ;node -> M list of nodes
(convert node-type-convert ;package -> M list of nodes
(default (lift1 list %store-monad)))
(name node-type-name) ;string
(description node-type-description)) ;string
;;;
;;; Graphviz export.
;;;
(define-record-type <graph-backend>
(graph-backend prologue epilogue node edge)
graph-backend?
(prologue graph-backend-prologue)
(epilogue graph-backend-epilogue)
(node graph-backend-node)
(edge graph-backend-edge))
(define (emit-prologue name port)
(format port "digraph \"Guix ~a\" {\n"
name))
(define (emit-epilogue port)
(display "\n}\n" port))
(define (emit-node id label port)
(format port " \"~a\" [label = \"~a\", shape = box, fontname = Helvetica];~%"
id label))
(define (emit-edge id1 id2 port)
(format port " \"~a\" -> \"~a\" [color = red];~%"
id1 id2))
(define %graphviz-backend
(graph-backend emit-prologue emit-epilogue
emit-node emit-edge))
(define* (export-graph sinks port
#:key
reverse-edges? node-type
(backend %graphviz-backend))
"Write to PORT the representation of the DAG with the given SINKS, using the
given BACKEND. Use NODE-TYPE to traverse the DAG. When REVERSE-EDGES? is
true, draw reverse arrows."
(match backend
(($ <graph-backend> emit-prologue emit-epilogue emit-node emit-edge)
(emit-prologue (node-type-name node-type) port)
(match node-type
(($ <node-type> node-identifier node-label node-edges)
(let loop ((nodes sinks)
(visited (set)))
(match nodes
(()
(with-monad %store-monad
(emit-epilogue port)
(store-return #t)))
((head . tail)
(mlet %store-monad ((id (node-identifier head)))
(if (set-contains? visited id)
(loop tail visited)
(mlet* %store-monad ((dependencies (node-edges head))
(ids (mapm %store-monad
node-identifier
dependencies)))
(emit-node id (node-label head) port)
(for-each (lambda (dependency dependency-id)
(if reverse-edges?
(emit-edge dependency-id id port)
(emit-edge id dependency-id port)))
dependencies ids)
(loop (append dependencies tail)
(set-insert id visited)))))))))))))
;;; graph.scm ends here

100
guix/scripts/graph.scm
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@ -18,6 +18,7 @@
(define-module (guix scripts graph)
#:use-module (guix ui)
#:use-module (guix graph)
#:use-module (guix scripts)
#:use-module (guix utils)
#:use-module (guix packages)
@ -28,9 +29,7 @@ (define-module (guix scripts graph)
#:use-module ((guix build-system gnu) #:select (standard-packages))
#:use-module (gnu packages)
#:use-module (guix sets)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
@ -41,38 +40,8 @@ (define-module (guix scripts graph)
%reference-node-type
%node-types
node-type
node-type?
node-type-identifier
node-type-label
node-type-edges
node-type-convert
node-type-name
node-type-description
%graphviz-backend
graph-backend?
graph-backend
export-graph
guix-graph))
;;;
;;; Node types.
;;;
(define-record-type* <node-type> node-type make-node-type
node-type?
(identifier node-type-identifier) ;node -> M identifier
(label node-type-label) ;node -> string
(edges node-type-edges) ;node -> M list of nodes
(convert node-type-convert ;package -> M list of nodes
(default (lift1 list %store-monad)))
(name node-type-name) ;string
(description node-type-description)) ;string
;;;
;;; Package DAG.
@ -291,73 +260,6 @@ (define (list-node-types)
(node-type-description type)))
%node-types))
;;;
;;; Graphviz export.
;;;
(define-record-type <graph-backend>
(graph-backend prologue epilogue node edge)
graph-backend?
(prologue graph-backend-prologue)
(epilogue graph-backend-epilogue)
(node graph-backend-node)
(edge graph-backend-edge))
(define (emit-prologue name port)
(format port "digraph \"Guix ~a\" {\n"
name))
(define (emit-epilogue port)
(display "\n}\n" port))
(define (emit-node id label port)
(format port " \"~a\" [label = \"~a\", shape = box, fontname = Helvetica];~%"
id label))
(define (emit-edge id1 id2 port)
(format port " \"~a\" -> \"~a\" [color = red];~%"
id1 id2))
(define %graphviz-backend
(graph-backend emit-prologue emit-epilogue
emit-node emit-edge))
(define* (export-graph sinks port
#:key
reverse-edges?
(node-type %package-node-type)
(backend %graphviz-backend))
"Write to PORT the representation of the DAG with the given SINKS, using the
given BACKEND. Use NODE-TYPE to traverse the DAG. When REVERSE-EDGES? is
true, draw reverse arrows."
(match backend
(($ <graph-backend> emit-prologue emit-epilogue emit-node emit-edge)
(emit-prologue (node-type-name node-type) port)
(match node-type
(($ <node-type> node-identifier node-label node-edges)
(let loop ((nodes sinks)
(visited (set)))
(match nodes
(()
(with-monad %store-monad
(emit-epilogue port)
(store-return #t)))
((head . tail)
(mlet %store-monad ((id (node-identifier head)))
(if (set-contains? visited id)
(loop tail visited)
(mlet* %store-monad ((dependencies (node-edges head))
(ids (mapm %store-monad
node-identifier
dependencies)))
(emit-node id (node-label head) port)
(for-each (lambda (dependency dependency-id)
(if reverse-edges?
(emit-edge dependency-id id port)
(emit-edge id dependency-id port)))
dependencies ids)
(loop (append dependencies tail)
(set-insert id visited)))))))))))))
;;;
;;; Command-line options.

1
guix/scripts/system.scm
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@ -29,6 +29,7 @@ (define-module (guix scripts system)
#:use-module (guix profiles)
#:use-module (guix scripts)
#:use-module (guix scripts build)
#:use-module (guix graph)
#:use-module (guix scripts graph)
#:use-module (guix build utils)
#:use-module (gnu build install)

1
tests/graph.scm
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@ -18,6 +18,7 @@
(define-module (test-graph)
#:use-module (guix tests)
#:use-module (guix graph)
#:use-module (guix scripts graph)
#:use-module (guix packages)
#:use-module (guix derivations)